Update log with stacktrace

• Update log with stacktrace, can ignored some path by using SetIgnoredPaths()
• Update file name to log file

Add feature set default log fields, get stack trace

• Feature set default log fields for all logs of application. Example: {"env" : "production"}.
• Add get stack trace for log level higher than WARN level.
• Add get stack trace for log gorm adapter.

Add log with context, add custom log field

• Add log with context
• Add custom log field, can remove log field
• Add field source if log level higher warn level
• Update format gorm logger
• Add correlation_id field for microservice
• Update README.md

Update set log file function

Update set log file function

Add singleton logger

Add singleton logger

Update echo logger middleware

Update echo logger middleware

Update echo middleware

Update echo middleware

Update echo adapter, echo middleware

v1.0.6

update echo adapter

Update gorm log adapter, add more example

v1.0.5

update gorm log adapter

Update default timestamp format

v1.0.4

refactor source